A good article: Bloom's Taxonomy Blooms Digitally
by Andrew Churches from the Technology & Learning Educators' eZineIntroduction and Background:
Bloom's Taxonomy
In the 1950's Benjamin Bloom developed his taxonomy of cognitive objectives, Bloom's Taxonomy. This categorized and ordered thinking skills and objectives. His taxonomy follows the thinking process. You can not understand a concept if you do not first remember it, similarly you can not apply knowledge and concepts if you do not understand them. It is a continuum from Lower Order Thinking Skills (LOTS) to Higher Order Thinking Skills (HOTS).